Calico x Blue Tabby
Possible colors (barring hidden recessive genes like pointed).
Males - Red Tabby, Black, or Blue/Blue Tabby, Brown Tabby (if mom is also carrying dilute)
Females - Calico/Tortie, Patched Tabby, Black or Brown Tabby or Blue Tabby.
You have to think of the Blue Tabby as a "dilute black" genetically. That is where you would get the brown tabbies (cause they are genetically a black cat).